Dump body for trucks



Sepf. 22, 1925. 1,554,509

J. .1. KEARNEY DUMP BODY FOR TRUCKS Filed July 28. 1924 v gnmnto'a Jrome .7. 'Jfeafrney,

61cm not ndrawingin which; the preferred mesa Sept. 22.1925. I

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To all 'wlunnz't mai ao mem 1 B it known that I, Jnnonm J. KEARNEY State-of Colorado, have invented-certain new and useful Improvements. in "Dump- 'Bod I .ies' for Trucks; and I do declare the folloW-' ing to be a full, clear, and exact description of the'inventiomsu'c'h as will enable-others I skilled in the art to which it -appertains to make and use the same, reference being had to the accompanying drawings," and to" the characters of reference marked thereon, which form a part of this specification.v This invention relates to dump bodies for -automobile trucks. I V The automobile truck is employed almost exclusively "for heavy hauling,- as it. is ad- I 1 nirably adaptedfor this purpose; In the. handling of sand, gravel, and coal, as

well as other materials that do'not require careful handling,'much time and labor can be saved by dumping the load instead'of unloading it by hand.

' ,Many'difierent types of dump have i been invented anduse d in connection with trucks and I doubt .claim to be the inven-' tor of this idea 'in its broadest aspect. .I"

have, however,'invented'a body that I differs in several important'partlculars from any with which I amj-faimliar, and. which possesses several advantages both as to con v struction and operation. I My invention can be most clearly del and will be most readilyunderstood when" reference is had to the accompany ng form there;

.of is illustrated, :and in which:

Fig. 1 is a side elevation of-aportionof.-

.an automobile truck chassis'showin lily-improved body in place thereon and in operartive position; and

- Fig. 2 is a view similar to that shown in liig.- 1 and shows-the body in dumping posit1on.-

4; Numeral 1 designates the channel iron side members of. an automobile truck, to'which.

' m improved dum body. is; secured; My bod consists of two-spaced improved angle irons 2? and 3, which aresecured-to "7 the upper flanges of the channels 1'by means pro'vidin of bolts or rivets 4 and 5. The rivets -5 I I have large conical heads and are spaced. I acitizen of the United States, residing at Denventhe city and countyof Denver,.and

equidistantly apart in the manner shown in Y I Fig; land serve a purpose which will be hereinafter Althou h there are I several rivets-five on each si e+it is not necessary that more than one. on each side shall pass through the flange of the chan- .nels -1. The-forward. ends of angles 2 are '60 connected by means of a built up I-beam having a central web 6 and angle iron .flangcs 7." A- bracket 8 (Fig.1) is connect ed to the Lbeam-and serves as a mean for anchoring the rear end of the spring '9, 05 which "passes throu h an opening in the web 5 6 and is'connectegto the lever 10. This. lever is pivoted at 11 between two angle-- irons 12 and carries a projecting lug 1-3, which projects 'rearwardly and has its rear '10 edge upwardly and forwardly inclined so .leasing of the lock. :Thebox16 is preferably made oi steel plates with'angle iron reinforcements. -The rearend of the box cut at an" angle andreiniorced with angles 17 whose upper ends have secured thereto eyelets 18, which receive the ends of the rod .19, to which the end gate 20 is hinged. It

is evident that onaccount of the fact that the rear. ends of the sides of -.the box are inclined forwardly in an upward .direction the end gate which is pivoted on rod 19, I will close beiore the box attains ahorizontal position. This is taken advantage of in" -an' automatic locking device,

which in 1 presently be-described.

For the". urpose of pivotally attaching the box. to t e truck,- I secure to the bottom of the box twopivot's 21. These pivots have their underside curved, as indicated by numeral 22. I The curved sides 22 are provided,

with s ced o nings 23 which are adapted toregi er the heaids of the'rivets 5.

When the box is tilted, it rocks on the curved sides 22 with the result that the pivot point moves as the box is tilted. When the box is in the position shown in Fig. 1, the forward end of the curved side 23 rests upon the angle 2 in the manner shown in Fig. I, but when the box is, tilted (Fig. 2) the rear part of the curved side 22 rests upon the angle. It will be seen that the rocking connection between the box and the supporting angles causes the pivot point or fulcrum to travel rearwardly when the box is dumped and forwardly when it is moved to horizontal position. By properly positioning the pivot members 21, it is possible to secure a relation of parts in which the box, when it is in the operative position (Fig. 1), will be such that a vertical line passing through the center of gravity of the box-will be to the rear of the point where the sides 22 contact with the flanges of the angles 1, but when the box is tilted for dumping (Fig. 2), the vertical line referred to passes to the front or the pivot point. It is therefore evident that when the box is in the position shown in Fig. 1, it has a tendency to rotate and move to the position shown in Fig. 2 and when it is in fully tilted position (Fig. 2), it has a tendency to move back to the position shown in Fig. 1. It left alone the box would naturally come to rest at a point intermediate the position shown in Fig. 1 and the dumping position. The box is held in operative position (Fig. 1) by means of the lever 10 and associated parts, which have been described above. In order to limit the tilting of thebox, ll provide two chains 2% and 25. The ends of the former are connected to the angle irons 26 that are secured to the bottom of the box, while chain 25 is connected to the angle irons 2, all in the manner shown in Fig. 2. A spring 27 connects the two chains. Let us now suppose that the box is in the position shown in Fig. 1 and that the driver releases hook 15 and pulls lever. 10 forwardly until the locking member 13 moves out of contact with the nose plate 14. The box will then start tilting and the momentum will carry it so far that the spring 27 will be tensioned. The spring 27 will bring the box to a gradual stop and give it an impulse in the other direction, which, when added to the naturaltendency to rotate back to a neutral posit-ion, will return it to the position shown in Fig.1 where it will antomatically lock. I the end gate were merely hun .looselyon the bar 19, it would open and c ose while'the box moved from operative to dumping position and back again. It is, of course, necessary that the "end gate should be locked, except when the of which one end of bar 33 is pivotally con- 7 nected. The other end of the bar 33 is piv oted at 3a to the end of the crank 35, which is rotatably mounted in the bearingsv 36. The other end of the rod from which the crank arm 35 is bent is also bent into a crank 37, which is longerthan the crank 35 and has its end piivoted to a link 38 whose other end is pivoted at 39 to the side of the channel 2. so proportioned and related that the books 30 will be moved to unlocking position as the box tilts from the position shown in Fig. 1 to that shown in Fig. 2 and to the locking position as it movesfloack to operative position.

When the box is full of sand, gravel or coal, or any other material that is dumped, theload will cause it to tilt farther and tension the spring 27 more than if the box is tilted when empty. This produces a strong force tending to return the box to operative position and as a result, it returns to this position as soon as the load is dumped, which makes the operation automatic. The driver is required merely to unlock the box by pulling the lever 10 forwardly.

It will be evident from the above that T have produced a dump y that is of simple and substantial construction, and which is practically automatic in its operation so that it is unnecessary for the driver to leave his seat in dumping a load.

Having now described my invention, what .I claim as new is:

The parts just described are lllil substantially on the level wlth the top of the box, means for holding said end gate in closed position, said means oomprisin a bar extending transversely of'the boxyand pivotally attached to the lower side oi the 1 box near. the rear. end thereof, a pair of hooks rigidly attached to said-bar, said hooks being adapted, to engage the lower.

end of the end gate, said bar having one end bent at right angles to provide a crank arm, another connecting rod joining the end of a crank shaft pivotally attached to the botthe long crank arm with a point on the 'tom of the box at a point spaced from the frame, said'means being adapted to release 10 bar, said crank shaft having two crank arms the 11d gate When the box is dumped. 5 of unequal length, a connecting rod joining In testimony whereof I aflix my signature. the end of the crank arm on the bar with the I e shorter crank arm on the crank shaft and JEROME J. KEARNEY. 

